My first 3 x S7s are very hashing well - except for one unit with a "woooo...wooo..." sound coming from the intake fan.
Did you try easing the screw(s) just a little-this seemed to help many. I would look at it and see first if they are so overtightened that fan plastic is a bit distorted (I have seen it), then would start with just one screw at first (quarter of a turn or even less), then do the direct opposite, then proceed with other 1-2 if needed. I had to ease just one fan screw on B1 for it to stop making a similar sound.
Tried all of that but did not help.
I recall a post that "just stuck a piece of tape" to fix it, .... but still no cigar
Now, I have reduced the fan to 55% and that kind of eliminated 95% the annoying sound - that fan speed gives me about 65-67c during day and 59-61c at night.
1 of the s7 b5 has this sound too but if fan is 65% & below it is not that loud but still very noticeable.
tried the screw trick no joy. i glued a small heatsink on the right side of the grill that lowered the woo woo woo sound but still there.
any other solutions ?
imo, better wait for next batch.
If I hold my hand up kinda close to the back fan the sounds stops. So some kind of rig for that?
Mine are in a datacenter so it can woo woo all day.
I used to put a gutted 120mm fan as a spacer between my s5 front fan and the chassis with 90mm screws.
Also put little spacers between the front grille and the fan giving about a quarter inch of space all around the edge of the grille.
Quieted down the s5 a bit. Fan is more efficient also.
The fan is really too close to the chassis on the s5 and s7.
So maybe a spacer between the back fan and the chassis?
